/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.coders;



import com.bff.gaia.unified.sdk.values.ShardedKey;

import com.bff.gaia.unified.vendor.guava.com.google.common.annotations.VisibleForTesting;



import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Arrays;

import java.util.List;



/** A {@link Coder} for {@link ShardedKey}, using a wrapped key {@link Coder}. */

@VisibleForTesting

public class ShardedKeyCoder<KeyT> extends StructuredCoder<ShardedKey<KeyT>> {

  public static <KeyT> ShardedKeyCoder<KeyT> of(Coder<KeyT> keyCoder) {

    return new ShardedKeyCoder<>(keyCoder);

  }



  private final Coder<KeyT> keyCoder;

  private final VarIntCoder shardNumberCoder;



  protected ShardedKeyCoder(Coder<KeyT> keyCoder) {

    this.keyCoder = keyCoder;

    this.shardNumberCoder = VarIntCoder.of();

  }



  @Override

  public List<? extends Coder<?>> getCoderArguments() {

    return Arrays.asList(keyCoder);

  }



  @Override

  public void encode(ShardedKey<KeyT> key, OutputStream outStream) throws IOException {

    keyCoder.encode(key.getKey(), outStream);

    shardNumberCoder.encode(key.getShardNumber(), outStream);

  }



  @Override

  public ShardedKey<KeyT> decode(InputStream inStream) throws IOException {

    return ShardedKey.of(keyCoder.decode(inStream), shardNumberCoder.decode(inStream));

  }



  @Override

  public void verifyDeterministic() throws NonDeterministicException {

    keyCoder.verifyDeterministic();

  }

}